Protective chest guard



FIG. 1 is a perspective view of our new design for a protective chest guard;

FIG. 2 is a front view thereof;

FIG. 3 is a left side view thereof;

FIG. 4 is a right side view thereof;

FIG. 5 is a top view thereof;

FIG. 6 is a bottom view thereof; and,

FIG. 7 is a rear view thereof.

The portions of the article shown by broken lines in the accompanying figures form no part of the claimed design. 

The ornamental design for a protective chest guard, as shown and described. 